Electric hammer.



H. P. WHALTON. ELECTRIC HAMMER. APPLICATION FILED NOV. 22, 1910.

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wit come a Jim/z H. P. WHALTON. ELECTRIC HAMMER. APPLICATION mum NOV. 2 2, 1910.

, Patented June 27, 1911.

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i snares PATENT ossron I-IILAEY F. WE/ALTON, 0F KEY WEST, FLORIDA.

ELECTRIC HAMMER.

Application filed llqovember 22, 1510. Serial No. 553,798.

a i I ecification of Letters Patent. Patented June io i.

To all whom '51 may concern:

Be it known that l, HILAR'Y'F. NHALToN, a citizen or the United States, residing at Key n t, in the county of Monroe and State of Florida, have invented certain new anduseful lamprovements in Electric Hammers; and i do hereby declare the following to be a full, clear, and exact: description of the invention such as will enable others slti led the art to which it sppertains to make and use the same. This invention relates to electric hammers provided with electromagnets and reversible contact mechanism; and it consists in the novel construction and combination of the parts I hereinafter fully described and claimed.

in the oil-sWings Figure 1 is the hammer with the front of the casing removed, front View of the electromagnets showing the reversing dea side view of vices 3; a plan view taken in section on the Y 1 -a= in Fig. 2. Fig. is diagrammatic plan view of the Contact mechanism. Fig. 5 is a diagram of the elec trical connections.

A is an inclosing case of any convenient size and material.

are two stationery electromagnels se cured to the bottom of the case.

C two slidable'electroniagnets secured together and arranged over tiie'electron1agnets 3. The ele troinagnets C are secured to the aru s of a, 'T. shaped cross head C", and D is a hammer shaft secured to the stem of the crosshead and arranged to one side of and between the centers of the pairs of elec troinsgnets. The electromagnets C guide-hars csecured to them Which are slideble vertically in guides c secured to the case. The guide-bars and guides are of any approved ferns but it is preferable to make the guides with Vshaped grooves for the guidebars to slide in, so as to make them work with very little friction. The hammer shaft. D slides in a hole d at the bottom of the case, and the hammer-head d is secured to its projecting end portion.

A. collar 6 is secured on the hammer shaft and t"l.- between two stops E and E secured the case, the stop E being preferably a cylinder surrounding the hammer; shaft and secured to thebot-tom of the case. Tlhese stops limit the motion of the slidable electroinagnets; e cores 6 oi t e stalionery electrouuu q have as are preferably con F are insulated contact-pieces secured to the case, and f are insulated contact-pieces carried by the elect-romagnets C. These con-- tact-pieces are kept in circuit in any approved manner, in the form of the de vices shown, the contact-pieces f slide upon the contact-pieces ll and are pressed on them. I by springs ft G is an adjustable resistance of any epproved make inclosed Within the casing and. arranged in circuit with the electromagnets. A lever or linger-piece g is provided for varying the resistance.

The automatic reversing devices shown in Fig. 2. His 3L tappet securedto the slidable electromagnets C, and it slidahle tappeteliar provided with project-ions it at its ends for the tappet to engage with. The tsppetloar h is provided will: guideliars i which are slidalile vertically in. guides i socured to the case A. and l are two insulated contact-pieces secured side by side in the case; and i and K are two similar insulated contact-piec secured. side by side in the case and anged. posits the con tact-pieces l and .l. J J" are two insulated contact-levers pivoted to the case by pins L and provided with contact-nieces and The'contact-pieces are all preferably formed of carbon. The contact-piece Works between the contact-pieces l and ii, and the contact picce'j works between the contacbpiece s I and K. M is e switch-lever pivoted to the case by a pin m. One end of this lever is pivotally connected by a pin m to an arm n on the tappet-bar ii, and the other end of the lever M is forked and is provided with cylinders N and N. l and P are insulated ill pistons slid-able in the cvlinders N and N;

and g2 and p are wheels journeled in the $11)] ccting end portions of the pistons P and P and bearing ageinst the contact-levers J and J respectively so a'sto rock the contact-levers when the lever M is oscillated on to the other line passes from. the lever J by a Wire magnets B, and by wire 5. The current also resistance G to the contact 6; and the other contachlever J 18 connected with theline wire 5 by a Wire 7.

The coi1tact- )iece 1 is connected with the contact-piece K by a wire 8; and the con tact I is connected with the contact-piece K by a wire 9, the Wires 8 and 9 being crossed but insulated from each other. The centact piece I is connected with the slidable elcctromagnets .C by a Wire 10; and the contact-piece l is connectee with the elctrciuaguetsC by a wire 11. The contact-pieces 1+ and f are included in the wires 10 land ll, when used, but the "wires 10 and 11 are sufiicicntly long and flexible the parts if and f can be omitted.

The tappet H makes and breaks and reverses the circuit automatically as long as current is supplied, and the luinuner shaft is reciprocated by the slidable electromagnets. The reversal of the motion of the slidahle elcctrmnagnets is accomplished by the levers 'J and J which are placedalternately in contact with the contact-pieces I I" and with the contact-pieces ll H; by the motion of the tappet .ll secured to the slidahle clec troinngnets C.

This construction permits the lisinu'ier to he used with equal facility in all directions and enables it to strike an upward blow with the same force a downward blow.

The pairs cl. stationary electromagncts and pairs of slid-able clectron'uignets are connested in. parallel and the stationary magnets are permanently magnetized while the hammer is in operation. The hammerhead delivers a dead blow which is net checked by the action of any return spring and as the current is reversed innnediately after the blow has been struck there is no tendency for the magnets to stick to each other.

i l/hat I claim is:

1. In an electric hammer the combination, with. case, and a stationary electromagnet secured in the case; of a slidahle electromagnet supported in the case and provided with. a hammer shaft, a switch lever pivoted in the said case and provided with two insulated. end portions, tapne mechanism for oscillating the said lever cc neeted to the said slidahlc ulectronia iu two contact-levers pivoted in the case provided with iinullated conte-"hpiece" and operutively connected with the i portions of the said switclnlen of stulionzu'y contac "pieces secured case and operating in connection with contact-pica"i oi the live said contact-1m respectively, and electric connection-- tivecn the line Wires including the eiectr0- magnets in parallel and including tact-levers in circuit with the slidahlc clcctreznagnet, the direction the through the slidahle clectroina versed auteniatically by the mechanism and sivitclrlever.

2 In an electric hammer the COiTil'iiIllttion, with a case, and a stationary ele ctromagnet secured in the case; 0'. a slidahle electroinagnet supported in the case and SWl'tCll- ,d. at

provided with a hammer shaft, a, lever pivoted in the case and one end with two spring-pi arranged side by side and. carr at their free ends, tappet incchanisn necting the; other end of the said switchlever with the slidahle electroinagnet, two contact-levers pivoted in the case in operative engagement with the said wheels and provided with insitilated contact-pieces,

two pairs of stationary contact-pieces secured in the case and operating; in connection with the contact-pieces the two said ci'mtact-levers respectively and electric connections between the line wires including the clectroniugnets in parallel and including the coiitact-levers in circuit with the slidahle electreinagnet, the direction of the current through the slidablc clcctroniagnet being reversed automatically by the said tappet mechanism and SWllQ(Zl1-lQVF.

In testimony whcreoi have alli ed my signature in the presence of two witnesses.

:HLARY l? 'l V'l-l'ALTGZl,

Witnesses:

ED. VAN DEL-DEN;

S. M. Lin nu. 

